mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
072e1d2910
- Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
65 lines
3.3 KiB
C
65 lines
3.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/bits/weaken.h"
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/strace.internal.h"
|
|
#include "libc/calls/struct/iovec.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/sock/sock.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
#include "libc/zipos/zipos.internal.h"
|
|
|
|
/**
|
|
* Writes data to file descriptor.
|
|
*
|
|
* @param fd is something open()'d earlier
|
|
* @param buf is copied from, cf. copy_file_range(), sendfile(), etc.
|
|
* @param size in range [1..0x7ffff000] is reasonable
|
|
* @return [1..size] bytes on success, or -1 w/ errno; noting zero is
|
|
* impossible unless size was passed as zero to do an error check
|
|
* @see read(), pwrite(), writev(), SIGPIPE
|
|
* @asyncsignalsafe
|
|
* @restartable
|
|
*/
|
|
ssize_t write(int fd, const void *buf, size_t size) {
|
|
ssize_t rc;
|
|
if (fd >= 0) {
|
|
if (IsAsan() && !__asan_is_valid(buf, size)) {
|
|
rc = efault();
|
|
} else if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
|
|
rc = weaken(__zipos_write)(
|
|
(struct ZiposHandle *)(intptr_t)g_fds.p[fd].handle,
|
|
&(struct iovec){buf, size}, 1, -1);
|
|
} else if (!IsWindows() && !IsMetal()) {
|
|
rc = sys_write(fd, buf, size);
|
|
} else if (fd >= g_fds.n) {
|
|
rc = ebadf();
|
|
} else if (IsMetal()) {
|
|
rc = sys_writev_metal(g_fds.p + fd, &(struct iovec){buf, size}, 1);
|
|
} else {
|
|
rc = sys_writev_nt(fd, &(struct iovec){buf, size}, 1);
|
|
}
|
|
} else {
|
|
rc = einval();
|
|
}
|
|
STRACE("write(%d, %#.*hhs%s, %'zu) → %'zd% m", fd, MAX(0, MIN(40, rc)), buf,
|
|
rc > 40 ? "..." : "", size, rc);
|
|
return rc;
|
|
}
|